mirror of
https://code.forgejo.org/infrastructure/documentation
synced 2024-11-22 03:21:10 +00:00
move k8s
Move to https://code.forgejo.org/infrastructure/k8s-cluster With no change at all.
This commit is contained in:
parent
25a23554a9
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10
README.md
10
README.md
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@ -3,11 +3,9 @@ There is a [dedicated chatroom](https://matrix.to/#/#forgejo-ci:matrix.org). A m
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## Table of content
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- Setting up a new [K8S/DRBD/NFS k8s node](k8s.md)
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- Maintenance and disaster recovery of a [K8S/DRBD/NFS k8s node](k8s-maintenance.md)
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- K8S cluster [files and documentation](https://code.forgejo.org/infrastructure/k8s-cluster)
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- Setting up a new [LXC/DRBD Host](lxc.md)
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- Managing services with a [LXC/DRBD/nginx stack](drbd-nginx-lxc.md)
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- Installing a [Forgejo instance in the K8S cluster](k8s-forgejo.md)
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- Installing a [Forgejo runner in an LXC container](runner-lxc.md)
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- Managing the [Octopuce host](octopuce.md)
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@ -319,12 +317,6 @@ stream {
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Dedicated to https://codeberg.org/forgejo-contrib/forgejo-helm and running from an ephemeral disk
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## hetzner{05,06}
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https://hetzner05.forgejo.org & https://hetzner06.forgejo.org run on [EX44](https://www.hetzner.com/dedicated-rootserver/ex44) Hetzner hardware.
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Nodes of [a k8s cluster](k8s.md).
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## Uberspace
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The website https://forgejo.org is hosted at
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@ -1,14 +0,0 @@
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apiVersion: cert-manager.io/v1
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kind: ClusterIssuer
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metadata:
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name: letsencrypt-http
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spec:
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acme:
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email: contact@forgejo.org
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server: https://acme-v02.api.letsencrypt.org/directory
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privateKeySecretRef:
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name: letsencrypt-http
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solvers:
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- http01:
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ingress:
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class: traefik
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@ -1,8 +0,0 @@
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apiVersion: metallb.io/v1beta1
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kind: IPAddressPool
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metadata:
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name: first-pool
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spec:
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addresses:
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- $failover_ipv4/32
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- $failover_ipv6/128
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@ -1,13 +0,0 @@
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apiVersion: helm.cattle.io/v1
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kind: HelmChart
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metadata:
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name: nfs
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namespace: default
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spec:
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chart: nfs-subdir-external-provisioner
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repo: https://kubernetes-sigs.github.io/nfs-subdir-external-provisioner
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targetNamespace: default
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set:
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nfs.server: $node_nfs_server
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nfs.path: /k8s
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storageClass.name: nfs
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@ -1,33 +0,0 @@
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---
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apiVersion: v1
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kind: PersistentVolume
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metadata:
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name: $pvc_name
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spec:
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capacity:
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storage: $pvc_capacity
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nfs:
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server: $node_nfs_server
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path: /k8s/$pvc_name
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accessModes:
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- ReadWriteMany
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persistentVolumeReclaimPolicy: Retain
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storageClassName: nfs
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mountOptions:
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- noatime
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- nfsvers=4.2
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volumeMode: Filesystem
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---
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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name: $pvc_name
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spec:
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accessModes:
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- ReadWriteMany
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resources:
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requests:
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storage: $pvc_capacity
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volumeName: $pvc_name
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storageClassName: nfs
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volumeMode: Filesystem
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@ -1,4 +0,0 @@
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node_drbd_shared_secret=***
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node_k8s_token=none
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@ -1,233 +0,0 @@
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#!/bin/bash
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SELF_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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if ${VERBOSE:-false}; then
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set -ex
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PS4='${BASH_SOURCE[0]}:$LINENO: ${FUNCNAME[0]}: '
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else
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set -e
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fi
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source $SELF_DIR/variables.sh
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source $SELF_DIR/secrets.sh
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set -o pipefail
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self_node=$(hostname | sed -e 's/hetzner0//')
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interface=${node_interface[$self_node]}
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dependencies="retry etckeeper"
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if ! which $dependencies >&/dev/null; then
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sudo apt-get -q install -qq -y $dependencies
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fi
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function setup_ufw() {
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sudo apt-get -q install -qq -y ufw
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sudo ufw --force reset
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sudo ufw default allow incoming
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sudo ufw default allow outgoing
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sudo ufw default allow routed
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for from in $nodes; do
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for to in $nodes; do
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if test $from != $to; then
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for v in ipv4 ipv6; do
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eval from_ip=\${node_$v[$from]}
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eval to_ip=\${node_$v[$to]}
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sudo ufw allow in on $interface from $from_ip to $to_ip
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done
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fi
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done
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done
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for host_ip in ${node_ipv4[$self_node]} ${node_ipv6[$self_node]}; do
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sudo ufw allow in on $interface to $host_ip port 22 proto tcp
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sudo ufw deny in on $interface log-all to $host_ip
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done
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for public_ip in $failover_ipv4 $failover_ipv6; do
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sudo ufw allow in on $interface to $public_ip port 22,80,443,2000:3000 proto tcp
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sudo ufw deny in on $interface log-all to $public_ip
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done
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sudo ufw enable
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sudo systemctl start ufw
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sudo systemctl enable ufw
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sudo ufw status verbose
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}
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function setup_drbd() {
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if ! test -f /etc/network/interfaces.d/drbd; then
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cat <<EOF | sudo tee /etc/network/interfaces.d/drbd
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auto $interface.$node_drbd_vlan
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iface $interface.$node_drbd_vlan inet static
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address $node_drbd_ipv4_prefix.$self_node
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netmask 255.255.255.0
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vlan-raw-device $interface
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mtu 1400
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EOF
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sudo ifup $interface.$node_drbd_vlan
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fi
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sudo apt-get install -y drbd-utils
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res_file=/etc/drbd.d/$node_drbd_resource.res
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if ! sudo test -f $res_file; then
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(
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cat <<EOF
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resource $node_drbd_resource {
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net {
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# A : write completion is determined when data is written to the local disk and the local TCP transmission buffer
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# B : write completion is determined when data is written to the local disk and remote buffer cache
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# C : write completion is determined when data is written to both the local disk and the remote disk
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protocol C;
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cram-hmac-alg sha1;
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# any secret key for authentication among nodes
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shared-secret "$node_drbd_shared_secret";
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}
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disk {
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resync-rate 100M;
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}
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EOF
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for node in $nodes; do
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cat <<EOF
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on hetzner0$node {
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address $node_drbd_ipv4_prefix.$node:7788;
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volume 0 {
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device /dev/drbd0;
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disk ${node_drbd_device[$node]};
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meta-disk internal;
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}
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}
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EOF
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done
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cat <<EOF
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}
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EOF
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) | sudo tee $res_file
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fi
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if ! sudo drbdadm status $node_drbd_resource >&/dev/null; then
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sudo drbdadm create-md $node_drbd_resource
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sudo systemctl enable drbd
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sudo systemctl start drbd
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fi
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if ! grep --quiet '^/dev/drbd0 /precious' /etc/fstab; then
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echo /dev/drbd0 /precious ext4 noauto,noatime,defaults 0 0 | sudo tee -a /etc/fstab
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sudo mkdir -p /precious
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fi
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}
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function setup_nfs() {
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sudo apt-get install -y nfs-kernel-server nfs-common
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if ! test -f /etc/network/interfaces.d/nfs; then
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cat <<EOF | sudo tee /etc/network/interfaces.d/nfs
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auto $interface.$node_nfs_vlan
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iface $interface.$node_nfs_vlan inet static
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address $node_nfs_ipv4_prefix.$self_node
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netmask 255.255.255.0
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vlan-raw-device $interface
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mtu 1400
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EOF
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sudo ifup $interface.$node_nfs_vlan
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fi
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if ! grep --quiet '^/precious' /etc/exports; then
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cat <<EOF | sudo tee -a /etc/exports
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/precious $node_nfs_ipv4_prefix.0/24(rw,fsid=0,no_root_squash,no_subtree_check)
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/precious/k8s $node_nfs_ipv4_prefix.0/24(rw,nohide,insecure,no_subtree_check)
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EOF
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sudo exportfs -va || true # it does not matter if the expored dirs do not exist, they will
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sudo exportfs -s
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fi
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}
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function setup_k8s() {
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existing=$1
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if ! test -f /etc/network/interfaces.d/k8s; then
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cat <<EOF | sudo tee /etc/network/interfaces.d/k8s
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auto $interface.$node_k8s_vlan
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iface $interface.$node_k8s_vlan inet static
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address $node_k8s_ipv4_prefix.$self_node
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netmask 255.255.0.0
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||||
vlan-raw-device $interface
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mtu 1400
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||||
up ip addr add $node_k8s_ipv6_prefix::$self_node/48 dev $interface.$node_k8s_vlan
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up ip addr add $failover_ipv4/$failover_ipv4_range dev $interface
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up ip addr add $failover_ipv6/$failover_ipv6_range dev $interface
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EOF
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||||
sudo ifup $interface.$node_k8s_vlan
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fi
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||||
if ! grep --quiet 'export KUBECONFIG' ~/.bashrc; then
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||||
echo "export KUBECONFIG=/etc/rancher/k3s/k3s.yaml" >>~/.bashrc
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||||
fi
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||||
#
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# To upgrade, systemctl stop k3s before running this. A node
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||||
# that is already part of a cluster does not need the --token
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||||
# or --server so there is no need to provide the number of an
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# existing node.
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||||
#
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||||
if ! sudo systemctl --quiet is-active k3s; then
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||||
args=""
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||||
if test "$existing"; then
|
||||
if ! test "$node_k8s_token"; then
|
||||
echo "obtain the token from node $existing with sudo cat /var/lib/rancher/k3s/server/token and set node_k8s_token= in secrets.sh"
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||||
exit 1
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||||
fi
|
||||
args="$args --token $node_k8s_token --server https://$node_k8s_ipv4_prefix.$existing:6443"
|
||||
fi
|
||||
if test "$self_node" = $node_k8s_etcd; then
|
||||
args="$args --disable-apiserver --disable-controller-manager --disable-scheduler"
|
||||
fi
|
||||
export INSTALL_K3S_VERSION=$K3S_VERSION
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||||
curl -fL https://get.k3s.io | sh -s - server $args --cluster-init --disable=servicelb --disable=traefik --write-kubeconfig-mode=600 --node-ip=$node_k8s_ipv4_prefix.$self_node,$node_k8s_ipv6_prefix::$self_node $node_k8s_cidr --flannel-ipv6-masq
|
||||
if test "$self_node" = $node_k8s_etcd; then
|
||||
retry --times 20 -- kubectl taint nodes $(hostname) key1=value1:NoSchedule
|
||||
fi
|
||||
if test "$self_node" != $node_k8s_etcd; then
|
||||
curl -fsSL https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash -
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
function setup_k8s_apply() {
|
||||
retry --delay 30 --times 10 -- bash -c "$SELF_DIR/subst.sh $1 | kubectl apply --server-side=true -f -"
|
||||
}
|
||||
|
||||
function setup_k8s_traefik() {
|
||||
# https://github.com/traefik/traefik-helm-chart?tab=readme-ov-file#deploying-traefik
|
||||
$SELF_DIR/subst.sh traefik.yml | helm upgrade --install --namespace kube-system traefik -f - --set installCRDs=true --version $TRAEFIK_VERSION oci://ghcr.io/traefik/helm/traefik
|
||||
setup_k8s_apply traefik-rate-limit.yml
|
||||
}
|
||||
|
||||
function setup_k8s_nfs() {
|
||||
setup_k8s_apply nfs.yml
|
||||
}
|
||||
|
||||
function setup_k8s_metallb() {
|
||||
helm repo add metallb https://metallb.github.io/metallb
|
||||
helm upgrade --install metallb --set installCRDs=true metallb/metallb
|
||||
setup_k8s_apply metallb.yml
|
||||
}
|
||||
|
||||
function setup_k8s_certmanager() {
|
||||
helm upgrade --install mycertmanager --set installCRDs=true oci://registry-1.docker.io/bitnamicharts/cert-manager
|
||||
setup_k8s_apply certmanager.yml
|
||||
}
|
||||
|
||||
function setup_k8s_pvc() {
|
||||
export pvc_name=$1
|
||||
export pvc_capacity=$2
|
||||
export pvc_owner=$3
|
||||
|
||||
sudo mount -o nfsvers=4.2 $node_nfs_server:/k8s /opt
|
||||
sudo mkdir -p /opt/$pvc_name
|
||||
sudo chown $pvc_owner:$pvc_owner /opt/$pvc_name
|
||||
sudo umount /opt
|
||||
|
||||
setup_k8s_apply pvc.yml
|
||||
}
|
||||
|
||||
"$@"
|
||||
|
|
@ -1,10 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
SELF_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
|
||||
|
||||
source $SELF_DIR/variables.sh
|
||||
|
||||
eval "cat <<EOF
|
||||
$(<$1)
|
||||
EOF
|
||||
"
|
||||
|
|
@ -1,9 +0,0 @@
|
|||
apiVersion: traefik.io/v1alpha1
|
||||
kind: Middleware
|
||||
metadata:
|
||||
name: forgejo-ratelimit
|
||||
spec:
|
||||
# https://doc.traefik.io/traefik/v3.1/middlewares/http/ratelimit/
|
||||
rateLimit:
|
||||
average: 10
|
||||
burst: 20
|
||||
|
|
@ -1,30 +0,0 @@
|
|||
deployment:
|
||||
replicas: 2
|
||||
ports:
|
||||
web:
|
||||
port: 80
|
||||
redirectTo:
|
||||
port: websecure
|
||||
priority: 1
|
||||
ssh-next:
|
||||
port: 2020
|
||||
exposedPort: 2020
|
||||
# https://github.com/traefik/traefik-helm-chart/blob/v32.1.1/traefik/values.yaml#L611-L614
|
||||
expose:
|
||||
default: true
|
||||
service:
|
||||
annotations:
|
||||
metallb.universe.tf/loadBalancerIPs: $failover_ipv4,$failover_ipv6
|
||||
spec:
|
||||
externalTrafficPolicy: Local
|
||||
ipFamilyPolicy: PreferDualStack
|
||||
logs:
|
||||
general:
|
||||
level: INFO
|
||||
access:
|
||||
enabled: true
|
||||
fields:
|
||||
headers:
|
||||
# https://github.com/traefik/traefik-helm-chart/blob/v32.1.1/traefik/values.yaml#L365-L369
|
||||
names:
|
||||
User-Agent: keep
|
||||
|
|
@ -1,45 +0,0 @@
|
|||
#!/bin/bash
|
||||
|
||||
K3S_VERSION=v1.30.5+k3s1
|
||||
TRAEFIK_VERSION=32.1.1
|
||||
|
||||
nodes="5 6"
|
||||
|
||||
node_interface=(
|
||||
[3]=enp5s0
|
||||
[5]=enp5s0
|
||||
[6]=enp5s0
|
||||
)
|
||||
|
||||
node_ipv4=(
|
||||
[5]=88.198.58.177
|
||||
[6]=65.108.204.171
|
||||
)
|
||||
|
||||
node_ipv6=(
|
||||
[5]=2a01:4f8:222:507::2
|
||||
[6]=2a01:4f9:1a:a082::2
|
||||
)
|
||||
|
||||
failover_ipv4=188.40.16.47
|
||||
failover_ipv4_range=32
|
||||
failover_ipv6=2a01:4f8:fff2:48::2
|
||||
failover_ipv6_range=48
|
||||
|
||||
node_drbd_vlan=4000
|
||||
node_drbd_resource=r1
|
||||
node_drbd_ipv4_prefix=10.53.100
|
||||
node_drbd_device=(
|
||||
[5]=/dev/nvme0n1
|
||||
[6]=/dev/nvme0n1
|
||||
)
|
||||
|
||||
node_nfs_vlan=4001
|
||||
node_nfs_ipv4_prefix=10.53.101
|
||||
node_nfs_server=$node_nfs_ipv4_prefix.100
|
||||
|
||||
node_k8s_vlan=4002
|
||||
node_k8s_ipv4_prefix=10.88.1
|
||||
node_k8s_ipv6_prefix=fd10
|
||||
node_k8s_cidr="--cluster-cidr=10.42.0.0/16,fd01::/48 --service-cidr=10.43.0.0/16,fd02::/112"
|
||||
node_k8s_etcd=3
|
||||
|
|
@ -1,23 +0,0 @@
|
|||
# Forgejo k8s instance
|
||||
|
||||
[forgejo](https://code.forgejo.org/forgejo-helm/forgejo-helm) configuration in [ingress](https://code.forgejo.org/forgejo-helm/forgejo-helm#ingress) for the reverse proxy (`traefik`) to route the domain and for the ACME issuer (`cert-manager`) to obtain a certificate. And in [service](https://code.forgejo.org/forgejo-helm/forgejo-helm#service) for the `ssh` port to be bound to the desired IPs of the load balancer (`metallb`). A [PVC](https://code.forgejo.org/forgejo-helm/forgejo-helm#persistence) is created on the networked storage.
|
||||
|
||||
## Secrets
|
||||
|
||||
### New
|
||||
|
||||
- `cp forgejo-secrets.yml.example $name-secrets.yml`
|
||||
- edit
|
||||
- `kubectl create secret generic forgejo-$name-secrets --from-file=value=$name-secrets.yml`
|
||||
|
||||
### Existing
|
||||
|
||||
- `kubectl get secret forgejo-$name-secrets -o json | jq -r '.data.value' | base64 -d > $name-secrets.yml`
|
||||
|
||||
## Storage
|
||||
|
||||
- `../k3s-host/setup.sh setup_k8s_pvc forgejo-$name 4Gi 1000`
|
||||
|
||||
## Pod
|
||||
|
||||
- `../k3s-host/subst.sh forgejo-values.yml | helm upgrade forgejo-$name -f - -f $name-values.yml -f crawler-block-values.yml -f $name-secrets.yml oci://code.forgejo.org/forgejo-helm/forgejo --atomic --wait --install`
|
||||
|
|
@ -1,32 +0,0 @@
|
|||
extraDeploy:
|
||||
- apiVersion: traefik.io/v1alpha1
|
||||
# https://doc.traefik.io/traefik/v3.1/routing/providers/kubernetes-crd/#kind-ingressroute
|
||||
kind: IngressRoute
|
||||
metadata:
|
||||
name: forgejo-crawler
|
||||
annotations:
|
||||
kubernetes.io/ingress.class: traefik
|
||||
spec:
|
||||
entryPoints:
|
||||
- web
|
||||
- websecure
|
||||
routes:
|
||||
# https://doc.traefik.io/traefik/v3.1/routing/routers/#rule
|
||||
- match: Host(`next.forgejo.org`) && HeaderRegexp(`user-agent`, `DataForSeoBot`)
|
||||
kind: Rule
|
||||
priority: 1000
|
||||
services:
|
||||
- name: noop@internal
|
||||
kind: TraefikService
|
||||
middlewares:
|
||||
- name: forgejo-crawler-blocker
|
||||
tls:
|
||||
secretName: tls-forgejo-next-ingress-http
|
||||
- apiVersion: traefik.io/v1alpha1
|
||||
kind: Middleware
|
||||
metadata:
|
||||
name: forgejo-crawler-blocker
|
||||
spec:
|
||||
ipAllowList:
|
||||
sourceRange:
|
||||
- 127.0.0.1/32
|
||||
|
|
@ -1,6 +0,0 @@
|
|||
gitea:
|
||||
admin:
|
||||
password: "***"
|
||||
config:
|
||||
mailer:
|
||||
PASSWD: "***"
|
||||
|
|
@ -1,34 +0,0 @@
|
|||
strategy:
|
||||
type: 'Recreate'
|
||||
|
||||
ingress:
|
||||
enabled: true
|
||||
annotations:
|
||||
# https://cert-manager.io/docs/usage/ingress/#supported-annotations
|
||||
# https://github.com/cert-manager/cert-manager/issues/2239
|
||||
cert-manager.io/cluster-issuer: letsencrypt-http
|
||||
cert-manager.io/private-key-algorithm: ECDSA
|
||||
cert-manager.io/private-key-size: 384
|
||||
kubernetes.io/ingress.class: traefik
|
||||
traefik.ingress.kubernetes.io/router.entrypoints: websecure
|
||||
|
||||
service:
|
||||
http:
|
||||
type: ClusterIP
|
||||
ipFamilyPolicy: PreferDualStack
|
||||
clusterIP: ~
|
||||
ssh:
|
||||
type: ClusterIP
|
||||
clusterIP: ~
|
||||
ipFamilyPolicy: PreferDualStack
|
||||
|
||||
redis-cluster:
|
||||
enabled: false
|
||||
postgresql:
|
||||
enabled: false
|
||||
postgresql-ha:
|
||||
enabled: false
|
||||
|
||||
persistence:
|
||||
enabled: true
|
||||
create: false
|
||||
|
|
@ -1,102 +0,0 @@
|
|||
image:
|
||||
registry: codeberg.org
|
||||
repository: forgejo-experimental/forgejo
|
||||
tag: '8.0-test'
|
||||
rootless: false
|
||||
|
||||
ingress:
|
||||
annotations:
|
||||
# https://doc.traefik.io/traefik/v3.1/routing/providers/kubernetes-ingress/#on-ingress
|
||||
# reference middlewares via `<namspace>-<name>@kubernetescrd`
|
||||
traefik.ingress.kubernetes.io/router.middlewares: default-forgejo-ratelimit@kubernetescrd
|
||||
tls:
|
||||
- hosts:
|
||||
- next.forgejo.org
|
||||
secretName: tls-forgejo-next-ingress-http
|
||||
hosts:
|
||||
- host: next.forgejo.org
|
||||
paths:
|
||||
- path: /
|
||||
pathType: Prefix
|
||||
|
||||
service:
|
||||
ssh:
|
||||
port: ssh
|
||||
|
||||
extraDeploy:
|
||||
# Route from traefik to forgejo
|
||||
- apiVersion: traefik.io/v1alpha1
|
||||
kind: IngressRouteTCP
|
||||
metadata:
|
||||
name: forgejo-next-ssh
|
||||
annotations:
|
||||
kubernetes.io/ingress.class: traefik
|
||||
spec:
|
||||
entryPoints:
|
||||
- ssh-next # name from traefik port
|
||||
routes:
|
||||
- match: HostSNI(`*`)
|
||||
services:
|
||||
- name: forgejo-next-ssh
|
||||
port: 2222 # forgejo ssh port on kubernetes service
|
||||
|
||||
persistence:
|
||||
claimName: forgejo-next
|
||||
|
||||
gitea:
|
||||
admin:
|
||||
username: earl-warren
|
||||
email: 'contact@earl-warren.org'
|
||||
config:
|
||||
APP_NAME: "Forgejo v8.0 demo"
|
||||
APP_SLOGAN: "ARCHIVED USE v8.next.forgejo.org instead"
|
||||
APP_DISPLAY_NAME_FORMAT: "{APP_NAME} [{APP_SLOGAN}]"
|
||||
log:
|
||||
LEVEL: "info"
|
||||
server:
|
||||
ROOT_URL: https://next.forgejo.org/
|
||||
DOMAIN: next.forgejo.org
|
||||
SSH_DOMAIN: next.forgejo.org
|
||||
SSH_PORT: "2020"
|
||||
LFS_START_SERVER: true
|
||||
OFFLINE_MODE: true
|
||||
repository:
|
||||
ROOT: /data/git/repositories
|
||||
service:
|
||||
REGISTER_EMAIL_CONFIRM: true
|
||||
DEFAULT_KEEP_EMAIL_PRIVATE: true
|
||||
ENABLE_NOTIFY_MAIL: true
|
||||
DISABLE_REGISTRATION: true
|
||||
actions:
|
||||
ENABLED: false
|
||||
mirror:
|
||||
ENABLED: false
|
||||
federation:
|
||||
ENABLED: true
|
||||
admin:
|
||||
SEND_NOTIFICATION_EMAIL_ON_NEW_USER: true
|
||||
cors:
|
||||
ENABLED: true
|
||||
ALLOW_DOMAIN: "*"
|
||||
HEADERS: "Access-Control-Allow-Origin"
|
||||
mailer:
|
||||
ENABLED: true
|
||||
FROM: "noreply@forgejo.org"
|
||||
PROTOCOL: "smtp+starttls"
|
||||
SMTP_ADDR: "ssl0.ovh.net"
|
||||
SMTP_PORT: "587"
|
||||
USER: "next@forgejo.org"
|
||||
database:
|
||||
PATH: /data/gitea.db
|
||||
DB_TYPE: sqlite3
|
||||
session:
|
||||
PROVIDER: db
|
||||
cache:
|
||||
ADAPTER: memory
|
||||
queue:
|
||||
TYPE: level
|
||||
indexer:
|
||||
REPO_INDEXER_ENABLED: true
|
||||
cron.archive_cleanup:
|
||||
SCHEDULE: "@hourly"
|
||||
OLDER_THAN: "2h"
|
||||
|
|
@ -1,23 +0,0 @@
|
|||
# Disaster recovery and maintenance
|
||||
|
||||
## When a machine or disk is scheduled for replacement.
|
||||
|
||||
* `kubectl drain hetzner05` # evacuate all the pods out of the node to be shutdown
|
||||
* `kubectl taint nodes hetzner05 key1=value1:NoSchedule` # prevent any pod from being created there (metallb speaker won't be drained, for instance)
|
||||
* `kubectl delete node hetzner05` # let the cluster know it no longer exists so a new one by the same name can replace it
|
||||
|
||||
## Routing the failover IP
|
||||
|
||||
When the machine to which the failover IP (failover.forgejo.org) is routed is unavailable or to be shutdown, to the [Hetzner server panel](https://robot.hetzner.com/server), to the IPs tab and change the route of the failover IP to another node. All nodes are configured with the failover IP, there is nothing else to do.
|
||||
|
||||
## Manual boot operations
|
||||
|
||||
### On the machine that runs the NFS server
|
||||
|
||||
* `sudo drbdadm primary r1` # Switch the DRBD to primary
|
||||
* `sudo mount /precious` # DRBD volume shared via NFS
|
||||
* `sudo ip addr add 10.53.101.100/24 dev enp5s0.4001` # add NFS server IP
|
||||
|
||||
### On the other machines
|
||||
|
||||
* `sudo ip addr del 10.53.101.100/24 dev enp5s0.4001` # remove NFS server IP
|
||||
107
k8s.md
107
k8s.md
|
|
@ -1,107 +0,0 @@
|
|||
# K8S node
|
||||
|
||||
Installing a K8S node using [scripts from the k3s-host](k3s-host) directory.
|
||||
|
||||
## Imaging
|
||||
|
||||
Using installimage from the rescue instance.
|
||||
|
||||
- `wipefs -fa /dev/nvme*n1`
|
||||
- `installimage -r no -n hetzner0?`
|
||||
- Debian bookworm
|
||||
- `PART / ext4 100G`
|
||||
- `PART /srv ext4 all`
|
||||
- ESC 0 + yes
|
||||
- reboot
|
||||
|
||||
Partitioning.
|
||||
|
||||
- First disk
|
||||
- OS
|
||||
- non precious data such as the LXC containers with runners.
|
||||
- Second disk
|
||||
- a partition configured with DRBD
|
||||
|
||||
Debian user.
|
||||
|
||||
- `ssh root@hetzner0?.forgejo.org`
|
||||
- `useradd --shell /bin/bash --create-home --groups sudo debian`
|
||||
- `mkdir -p /home/debian/.ssh ; cp -a .ssh/authorized_keys /home/debian/.ssh ; chown -R debian /home/debian/.ssh`
|
||||
- in `/etc/sudoers` edit `%sudo ALL=(ALL:ALL) NOPASSWD:ALL`
|
||||
|
||||
## Install helpers
|
||||
|
||||
Each node is identifed by the last digit of the hostname.
|
||||
|
||||
```sh
|
||||
sudo apt-get install git etckeeper
|
||||
git clone https://code.forgejo.org/infrastructure/documentation
|
||||
cd documentation/k3s-host
|
||||
cp variables.sh.example variables.sh
|
||||
cp secrets.sh.example secrets.sh
|
||||
```
|
||||
|
||||
Variables that must be set depending on the role of the node.
|
||||
|
||||
- first server node
|
||||
- secrets.sh: node_drbd_shared_secret
|
||||
- other server node
|
||||
- secrets.sh: node_drbd_shared_secret
|
||||
- secrets.sh: node_k8s_token: content of /var/lib/rancher/k3s/server/token on the first node
|
||||
- variables.sh: node_k8s_existing: identifier of the first node (e.g. 5)
|
||||
- etcd node
|
||||
- secrets.sh: node_k8s_token: content of /var/lib/rancher/k3s/server/token on the first node
|
||||
- variables.sh: node_k8s_existing: identifier of the first node (e.g. 5)
|
||||
- variables.sh: node_k8s_etcd: identifier of the node whose role is just etcd (e.g. 3)
|
||||
|
||||
The other variables depend on the setup.
|
||||
|
||||
## Firewall
|
||||
|
||||
`./setup.sh setup_ufw`
|
||||
|
||||
## DRBD
|
||||
|
||||
DRBD is [configured](https://linbit.com/drbd-user-guide/drbd-guide-9_0-en/#p-work) with:
|
||||
|
||||
`./setup.sh setup_drbd`
|
||||
|
||||
Once two nodes have DRBD setup for the first time, it can be initialized by [pretending all is in sync](https://linbit.com/drbd-user-guide/drbd-guide-9_0-en/#s-skip-initial-resync) to save the initial bitmap sync since there is actually no data at all.
|
||||
|
||||
|
||||
```sh
|
||||
sudo drbdadm primary r1
|
||||
sudo drbdadm new-current-uuid --clear-bitmap r1/0
|
||||
sudo mount /precious
|
||||
```
|
||||
|
||||
## NFS
|
||||
|
||||
`./setup.sh setup_nfs`
|
||||
|
||||
On the node that has the DRBD volume `/precious` mounted, set the IP of the NFS server to be used by k8s:
|
||||
|
||||
```sh
|
||||
sudo ip addr add 10.53.101.100/24 dev enp5s0.4001
|
||||
```
|
||||
|
||||
## K8S
|
||||
|
||||
For the first node `./setup.sh setup_k8s`. For nodes joining the cluster `./setup.sh setup_k8s 6` where `hetzner06` is an existing node.
|
||||
|
||||
- [metallb](https://metallb.universe.tf) instead of the default load balancer because it does not allow for a public IP different from the `k8s` node IP.
|
||||
`./setup.sh setup_k8s_metallb`
|
||||
- [traefik](https://traefik.io/) [v2.10](https://doc.traefik.io/traefik/v3.1/) installed from the [v25.0](https://github.com/traefik/traefik-helm-chart/tree/v31.1.1) helm chart.
|
||||
`./setup.sh setup_k8s_traefik`
|
||||
- [cert-manager](https://cert-manager.io/).
|
||||
`./setup.sh setup_k8s_certmanager`
|
||||
- NFS storage class
|
||||
`./setup.sh setup_k8s_nfs`
|
||||
|
||||
## K8S NFS storage creation
|
||||
|
||||
Define the 20GB `forgejo-data` pvc owned by user id 1000.
|
||||
|
||||
```sh
|
||||
./setup.sh setup_k8s_pvc forgejo-data 20Gi 1000
|
||||
```
|
||||
Loading…
Reference in a new issue